Antenna



FIG. 1 is a front elevational view of an antenna showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side view thereof, the right side view being a mirror image thereof;

FIG. 5 is a front, right perspective view thereof;

FIG. 6 is a top perspective view thereof; and,

FIG. 7 is a rear, right perspective view thereof. 

CLAIM The ornamental design for an antenna, as shown and described. 